Looking at the diagram it does not appear that pad goes anywhere; if so then it doesn't matter if it's left unsoldered, and it wouldn't change anything if it were soldered. If the other side of the bo

From another list, this link goes to it; I see posts from early this month, September. http://r1rl8.skipdns.link/rb/

RadioBoard is gone for past week or so; so far as I know no one who knows anything has said anything yet. Jim Kearman KR1S is the owner of RadioBoard; hopefully something bad didn't happen to him. 73,

Hi Peter, The radio uses the SiLabs DSP chip--it requires a specific inductance so the DSP chip will tune. It's not an external antenna input as such, it wants an inductance such as what the stock fer

Well, I'm afraid without some real unsoldering work which would leave the FSL unusable, your idea won't work. The Pl360/365/SSB etc. all use the SiLabs DSP chip which tunes the antenna inductance (whi

Are you asking if you can mechanically connect a FSL's inductor (removing connections to its variable capacitor first) to a 3.5mm plug to replace the stock ferrite rod antenna? Steve

Looks to me they came through with no changes from what they were when I sent them--same size and perfectly clear. This is the way it should be! Steve

Let's see how these four files do, posting to this list; posting to IRCA list with them causes the files to become larger plus compressed resulting in them looking fuzzy. They're all loopamps I tested

I bought some of these about 8 months ago and tested them on the Q meter. They have good Q and I believe would make a good FSL, given their short length. They go on sale like they are now every few mo

Reading my comments, it might seem that I put the on/off switch in parallel with the load resistors but that is not so--I put the switch in series with the load resistors (which were in parallel to gi

I greatly enjoyed the previous comments about battery life in the Xhdata D-808 radio and how battery life varies so much and was motivated to run some tests of my own. I ran some tests on my own vario

Now we need to find the least expensive method of cleaning variable caps not requiring (very) expensive DeOxit spray cleaner. Would cheap drugstore isopropyl alcohol work well enough? Maybe used in a

I received my Mike's Electronics latest version of the Oren Elliot-manufactured latest version "0219" N50-384P variable cap with vernier today. There is a way to test the relative Q of a capacitor on

I just checked with Mike at https://www.mikeselectronicparts.com/ and he says his current caps are the latest version "0219" so I just ordered one to try. Thanks for this info, Gary. 73, Steve

Hi Gary, Where are you obtaining the latest 0219 variable caps--from the manufacturer or from Mike's Electronics? This is certainly a very interesting finding. 73, Steve

I wound a coil using 330/46 Litz to compare with the other two. 21 turns gave 273.3 uH, quite a bit higher than the other two due to the narrower width coil. Probably 1 or 2 turns should be removed fo

I should add that my 140mm ferrite rods are Chinese rods, not Russian rods, and that the results may be different using Russian rods. I don't have enough Russian rods to do the experiment using them.

This experiment compares a ferrite sleeve coil of 1162/46 Litz with a ferrite sleeve coil of 660/46, both 21 turns with final coil diameter about 6 3/8", using 140 mm ferrite rods in the ferrite sleev

Hi Dean, I'm not sure what you're trying to do but in the Files, the opening page at the bottom is a .pdf called "matching transformers using binocular core". Maybe that will give you some ideas. http

I should add that my coil is wound with 175/46 Litz, perhaps a little smaller diameter than the specified 100/44 Litz. I've found it works even better at LF, in fact I've found all the types of /46 Li